Window brake



J. BILAN wINDow BRAKE April 2, 1946.

Filed Jan. 24, 1944 INVENTOR.

Patented Apr. 2, 1946 -UNITED sTATEsI TPATENT oF FlcE WINnow Bit-Ami' V John Blan, Flint, Mich.

I application January 24, 1944, Serial No. 519,564

2 Claims.

'The present inventicn relates to window brakes and has for its object the provision of means for frictionally engaging window sash with the window frame, for preventing the sash from sliding downwardly within the frame when the sash is brought to an open position, and has particular application in windows devoid of usual cords and weights for maintaining the window sash in an open position within the window frame.

A still further objectpf the present invention is to provide a generally improved window brake for the purpose above indicated. i

With the above general objects in view and others that will appear as the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the 'appended claims. 4

In the drawing forming a part of this application, and in which like designating Characters refer to corresponding parts throughout the several views;

Fig. 1 is a face elevational view of a window sash, partly broken away to show in elevation the brake mechanism; V 4

Fig. 2 is an edge view of the window sash;

Fig. 3 is a cross-sectional view on line 3-3 of Fig. 1; and

Fig. 4 is a perspective elevational view of a plate constituting a part of the window brake.

Referring to the present drawing there is shown therein an upright bar 111 of a window sash, including window pane 11. Cooperating with said sash bar 111 is the upright portion of window frame 12.

Centrally of sash bar 10, and on a plane coextensive with the window pane is recess 13, accommodating therewithin cam 14 which substantially is of a triangular shape. Said recess 13 is open at the edge of sash bar permitting the upright face of cam 14 to extend beyond the edge of sash bar 1D. v

IExtending through the sash bar 10 and transversely of recess 13 is shaft which in any known manner rigidly engages and passes through 'cam 14 -for the purpose of angularly shifting said cam 14 when saidshaft 15 is operated by means of thumb knob 16. To maintain said shaft in position with relation to sash bar 10, the opposite end of said shaft 15, cxtending beyond the adjacent face of sash bar 10 is threaded to receive nut 1'1.

The invention further includes plate 18, which, at two oppositely disposed narrow ends carries integrally formed tongues 19 which are in atperpendicular relation with plate 18; as isy clearly seen in Fig. 4. Said tongues 19 are' received within recess 13 through its open end, and are held within said recess 13 in position by virtue of frictonal contact with the adjacent horizontal walls of said recess 13, as is clearly seen in Fig. 1-. The width of said tongues 19 substantially correspond to the width of said recess 13. Normally plate 18 contacts with the adjacent edge of sash bar 1D, and overlies the open end of recess 13. Plate 18 is considerably wider than tongues 19 or recess 13 for the purpose of providing a comparatively large engaging area with frame 12 when plate 18 is shifted towards said frame 12 on operation of cam 14, as will be hereinafter apparent.

Centrally, the lbody portion of shaft 15 is crimped as is seen in Fig. 1, for the purpose of rigidly enga'ging cam 14. When said shaft 15 is forced through the bore in sash 10 the cen- V tral crimped portion thereof will pass through the wood, preparatory to assembling of the device in the sash.

When window sash -is in a raised position with respect to window frame 12 and it is desirable to lock the window sash with frame 12 in order to maintain the frame in a raised position and to prevent the same from sliding downwardly, shaft 15 is rotated by knob 16 to shift the enlarged portion of cam 14 towards -plate 18. This operation will cause tongues 19 to make an outward sliding movement within recess 13 and will bring plate 18 in contact with the adjacent face of window frame 12, frictionally engaging the latter, the outer face of said plate 18 being roughened as is indicated in Fig. 2 to increase the frictional contact between said plate 18 and window frame 12. In the operative position of the brake frictional contact is brought about between the operative edgeof cam 14 and the inner face of plate 18, preventing cam 14 from shifting from its engagement with plate 18, by virtue of which engagement cam 14 will become locked to plate 18, and the latter locked to window frame 12. This frictional engagement between several parts, facilitated by the weight of the window sash will maintain the window sash in a locked engagement with window frame 12. This engagement will be maintained until shaft 15 is rotated to the opposite direction by Operating knob 16 in order to release the frictional engagement of cam 14 with plate 18. 'When this is done the frictional engagement of plate 18 with window frame 12 will in turn be released and this in consequence will release the looking engagement between window sash and window frame l2, permitting downward slidingof window sash within frame 12, for closing of the window.

Fromthe hereinabove descripton it Will loe` seen that the window brake herein disclosed and described` contains comparatively few parts which may be readily assem'oled and afiixed to the window. ,v V

While Vithere 'is 'described herein-1a preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may 1 be made therein without departing fromV the spirit and scope of the invention as claimed.

What I claim as new is: V V tj l 1. A sash holder adapted for use in a sash rail having a recess therein, comprisingf-a-shaftsextending transversely of said recess, a cam mounted on the shaft within the recess, a plate at the Viopenl side/of :the recessffand extending `translat'ersiy fbeyondeach opposite -edg'e v'of the recess externaily thereof, and a pair of tongues at the opposite ends of the plate and extending into `yat-,the;0pen :side of the recess and extending transverselylfvheyond each ',opposite-e'dge of the recess externally thereof, and a pair of tongues at the opposite ends of the plate and extend- Ving into the recess for holding the plate in `aligned relation with the recess at the open side thereof -in position for bearing of the cam thereon, said tongues lheing integral with the plate and disposed infi'sliding :relation with opposite edges of,therecess, said plate being wider than the tongues and the recess.

" JOHN ,;-B1LA'N 

